Improvement in tube-welding machines



J. R. LEMEN.

, Tube Welding-Machines.

No.148,`717, Parentedmaroh17.1s74.

JOSEPH R. LEMEN, OF OHAFIPAIGN, ILLINOIS, ASSIGNOR TO HIMSELF AND T.v G. LANSDEN, OF SAME PLACE.

IMPROVEMENT IN TUBES-WELDING MACHINS.

Specification forming part of Letters Patent No. 148,7] 7, dated March 17, 1&74;A applicaticn tiled January 24, 1874.

To all whom it may concern:

Beit known that I, J osEPH R. LEMEN, of Champaign, in the county of Champaign and State of Illinois, have invented a new and Improved Machine for lVelding Boiler-Tubes, of which the following is a specification:

The invention will first be fully described and then pointed out in the claims.

Figure 1 is a front elevation ot' my improved machine. Fig. 2 is partly a side elevation, and partly a section, through the dies for reducing the end of the piece to be inserted in the other piece. Fig. 3 Ais a section through the welding-dies, and Fig. 4 is a section of a tube showing aweld, also, a reduced end with a ferrule on it, such as is applied to the ends of the tubes which project through the tubesheet into the lire, the said reduced part being of the same character as for a weld, for which the machine is alike adapted.

Similar letters of reference indicate corresponding parts.

A represents the anvil-die, and B the hammer-die, for hammering y down and reducing' the end of the tube to be inserted in the piece to be welded on, or for receiving the ferrule O on the end to be tted in the tube, and D represents the mandrel to be used with said dies. lThe anvi1-die has a part, a, of its concave face made on a circle enough larger than the part b to equal the thickness of the metal of which the tube is made, so that the mandrel D, 0n which the tube is to be hammered being entered in the end to be reduced, and lying on the part l), will hold the tube, so that when hammered by the die it will rest on the part a., so as to be suitably contracted and reduced, and not stretched or drawn out larger, as it would be if hammered on the mandrel alone. The said part a is made as long betweenthe end and part b as it is required to reduce the end of the tube, so that the shoulder of part b forms the gage for length. Fart b has a little groove, E, along the bottom for the scale to fall into to prevent it from raising the mandrel. I is the anvil-die, and J the hammer-die for welding the tubes together. They are concave like the others, but of uniform size and shape from end to end, except a little convexity in the form of the hammer-die, as shown in Fig. 3, and the anvil-die is of considerably greater length than the hammer-die, to avoid angular indentations in the surface of the tube. O is the mandrel of the welding-dies. F represents the handles or shanks of the mandrels; G, the collars, and H the crotched rests for them.

The hammer-dies will be worked by blows of a sledge or heavy hammer, or by any other suitable means. They may have springcatches K, or other devices, to hold them up when required for adjusting the tubes under them.

The hammer-dies .are connected to a bedpiece, L, and one is provided with clips M to be fastened on an ordinary blacksmiths anvil, N, by a set-screw as a convenient support for the use of the apparatus at the blacksmiths forge. The tubes are presented from the right-hand sides, as to Figs. 2 and 3, and held by the other end in the hand of the attendant to be turned and shifted about, as required.

The weld ofthe tube, Fig. 4, is indicated by the lines e f. The reduced end P represents the shape of the part to be entered in the end of another piece of ordinary size preparatory to the welding.

Having thus described my invention, l claim as new and desire to secure by Letters Fatentl. The pairs of anvil and hammer dies A B and I J, and mandrels D and O, combined in the manner described, for welding tubes.

2. The anvil-die A, having the two-part face a l), in combination with the hammer-die B and mandrel D, substantially as specied.

JOSEPH R. LEMEN.

Witnesses:

GEO. J. Honens, L. W. TULLEYs.

TENT OFFICE. y 

